Of course, those 7 Republicans were just the group that SWITCHED votes. There's an even longer list to be made of all the Republicans who voted against this bill from the beginning.
The only Republicans who supported the bill:
Justin Amash, Mike Coffman, Ryan Costello, Carlos Curbelo, Charlie Dent (Co-Sponsor), Mario Diaz-Balart, Robert Dold, Dan Donovan, Tom Emmer (WTF?), Mike Fitzpatrick, Rodney Frelinghuysen, Chris Gibson, Richard Hanna, Joe Heck, Will Hurd, David Jolly, John Katko, Leonard Lance, Frank LoBiondo, Tom MacArthur, Martha McSally, Pat Meehan, Erik Paulsen, Dave Reichert, Ileana Ros-Lehtinen, Tom Reed, Elise Stefanik, Fred Upton, Lee Zeldin
Matt Salmon, Sam Johnson, and Jaime Herrera Beutler (Who gave birth today) were absent.
Notable names I see missing from that list: Barbara Comstock, Rod Blum, Cresent Hardy, Steve Knight, Scott Garrett, Tim Walberg, Frank Guinta, and Mike Bishop.
Salmon's absence is interesting. He (as far as I know) still opposes SSM even though his son is openly gay. (His son, by the way, is a former chairman of Arizona Log Cabin Republicans, which is a group of Republicans who are pro-LGBT rights.) He is retiring, so it will be interesting to see what he says after. Congratulations to Jaime Herrera Beutler on giving birth! Some, like Coffman and Dold really make sense because they are both in states Obama won twice, and the former's district has been quickly trending Democratic, and the latter's is very socially liberal. Not only are many of the NY, NJ, PA GOP Congressmen more pro-LGBT, but that is an asset since many come from swing districts. I wonder how this effects Comstock, Blum, and Hardy. I hope all 3 win reelection, but they're already facing uphill battles. Emmer really is a huge shock, I remember his unsuccessful governor run was pretty anti-LGBT. He has also joined the Republican Main Street Partnership, so he seems to be moving to the center on social issues.